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Merge tag 'arc-5.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/…
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…git/vgupta/arc

Pull ARC fixes from Vineet Gupta:

 - hsdk platform unifying apertures

 - build system CROSS_COMPILE prefix

* tag 'arc-5.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: [plat-hsdk]: unify memory apertures configuration
  ARC: build: Try to guess CROSS_COMPILE with cc-cross-prefix
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@torvalds
torvalds committed Jun 29, 2019
2 parents c57582a + ec9b4fe commit f8b5c72
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Showing 2 changed files with 157 additions and 8 deletions.
4 changes: 4 additions & 0 deletions arch/arc/Makefile
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Expand Up @@ -5,6 +5,10 @@

KBUILD_DEFCONFIG := nsim_hs_defconfig

ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-)
endif

cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
cflags-$(CONFIG_ISA_ARCV2) += -mcpu=hs38
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161 changes: 153 additions & 8 deletions arch/arc/plat-hsdk/platform.c
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Original file line number Diff line number Diff line change
Expand Up @@ -32,8 +32,6 @@ static void __init hsdk_init_per_cpu(unsigned int cpu)

#define ARC_PERIPHERAL_BASE 0xf0000000
#define CREG_BASE (ARC_PERIPHERAL_BASE + 0x1000)
#define CREG_PAE (CREG_BASE + 0x180)
#define CREG_PAE_UPDATE (CREG_BASE + 0x194)

#define SDIO_BASE (ARC_PERIPHERAL_BASE + 0xA000)
#define SDIO_UHS_REG_EXT (SDIO_BASE + 0x108)
Expand Down Expand Up @@ -99,20 +97,167 @@ static void __init hsdk_enable_gpio_intc_wire(void)
iowrite32(GPIO_INT_CONNECTED_MASK, (void __iomem *) GPIO_INTEN);
}

static void __init hsdk_init_early(void)
enum hsdk_axi_masters {
M_HS_CORE = 0,
M_HS_RTT,
M_AXI_TUN,
M_HDMI_VIDEO,
M_HDMI_AUDIO,
M_USB_HOST,
M_ETHERNET,
M_SDIO,
M_GPU,
M_DMAC_0,
M_DMAC_1,
M_DVFS
};

#define UPDATE_VAL 1

/*
* This is modified configuration of AXI bridge. Default settings
* are specified in "Table 111 CREG Address Decoder register reset values".
*
* AXI_M_m_SLV{0|1} - Slave Select register for master 'm'.
* Possible slaves are:
* - 0 => no slave selected
* - 1 => DDR controller port #1
* - 2 => SRAM controller
* - 3 => AXI tunnel
* - 4 => EBI controller
* - 5 => ROM controller
* - 6 => AXI2APB bridge
* - 7 => DDR controller port #2
* - 8 => DDR controller port #3
* - 9 => HS38x4 IOC
* - 10 => HS38x4 DMI
* AXI_M_m_OFFSET{0|1} - Addr Offset register for master 'm'
*
* Please read ARC HS Development IC Specification, section 17.2 for more
* information about apertures configuration.
*
* m master AXI_M_m_SLV0 AXI_M_m_SLV1 AXI_M_m_OFFSET0 AXI_M_m_OFFSET1
* 0 HS (CBU) 0x11111111 0x63111111 0xFEDCBA98 0x0E543210
* 1 HS (RTT) 0x77777777 0x77777777 0xFEDCBA98 0x76543210
* 2 AXI Tunnel 0x88888888 0x88888888 0xFEDCBA98 0x76543210
* 3 HDMI-VIDEO 0x77777777 0x77777777 0xFEDCBA98 0x76543210
* 4 HDMI-ADUIO 0x77777777 0x77777777 0xFEDCBA98 0x76543210
* 5 USB-HOST 0x77777777 0x77999999 0xFEDCBA98 0x76DCBA98
* 6 ETHERNET 0x77777777 0x77999999 0xFEDCBA98 0x76DCBA98
* 7 SDIO 0x77777777 0x77999999 0xFEDCBA98 0x76DCBA98
* 8 GPU 0x77777777 0x77777777 0xFEDCBA98 0x76543210
* 9 DMAC (port #1) 0x77777777 0x77777777 0xFEDCBA98 0x76543210
* 10 DMAC (port #2) 0x77777777 0x77777777 0xFEDCBA98 0x76543210
* 11 DVFS 0x00000000 0x60000000 0x00000000 0x00000000
*/

#define CREG_AXI_M_SLV0(m) ((void __iomem *)(CREG_BASE + 0x20 * (m)))
#define CREG_AXI_M_SLV1(m) ((void __iomem *)(CREG_BASE + 0x20 * (m) + 0x04))
#define CREG_AXI_M_OFT0(m) ((void __iomem *)(CREG_BASE + 0x20 * (m) + 0x08))
#define CREG_AXI_M_OFT1(m) ((void __iomem *)(CREG_BASE + 0x20 * (m) + 0x0C))
#define CREG_AXI_M_UPDT(m) ((void __iomem *)(CREG_BASE + 0x20 * (m) + 0x14))

#define CREG_AXI_M_HS_CORE_BOOT ((void __iomem *)(CREG_BASE + 0x010))

#define CREG_PAE ((void __iomem *)(CREG_BASE + 0x180))
#define CREG_PAE_UPDT ((void __iomem *)(CREG_BASE + 0x194))

static void __init hsdk_init_memory_bridge(void)
{
u32 reg;

/*
* M_HS_CORE has one unique register - BOOT.
* We need to clean boot mirror (BOOT[1:0]) bits in them to avoid first
* aperture to be masked by 'boot mirror'.
*/
reg = readl(CREG_AXI_M_HS_CORE_BOOT) & (~0x3);
writel(reg, CREG_AXI_M_HS_CORE_BOOT);
writel(0x11111111, CREG_AXI_M_SLV0(M_HS_CORE));
writel(0x63111111, CREG_AXI_M_SLV1(M_HS_CORE));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_HS_CORE));
writel(0x0E543210, CREG_AXI_M_OFT1(M_HS_CORE));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_HS_CORE));

writel(0x77777777, CREG_AXI_M_SLV0(M_HS_RTT));
writel(0x77777777, CREG_AXI_M_SLV1(M_HS_RTT));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_HS_RTT));
writel(0x76543210, CREG_AXI_M_OFT1(M_HS_RTT));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_HS_RTT));

writel(0x88888888, CREG_AXI_M_SLV0(M_AXI_TUN));
writel(0x88888888, CREG_AXI_M_SLV1(M_AXI_TUN));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_AXI_TUN));
writel(0x76543210, CREG_AXI_M_OFT1(M_AXI_TUN));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_AXI_TUN));

writel(0x77777777, CREG_AXI_M_SLV0(M_HDMI_VIDEO));
writel(0x77777777, CREG_AXI_M_SLV1(M_HDMI_VIDEO));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_HDMI_VIDEO));
writel(0x76543210, CREG_AXI_M_OFT1(M_HDMI_VIDEO));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_HDMI_VIDEO));

writel(0x77777777, CREG_AXI_M_SLV0(M_HDMI_AUDIO));
writel(0x77777777, CREG_AXI_M_SLV1(M_HDMI_AUDIO));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_HDMI_AUDIO));
writel(0x76543210, CREG_AXI_M_OFT1(M_HDMI_AUDIO));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_HDMI_AUDIO));

writel(0x77777777, CREG_AXI_M_SLV0(M_USB_HOST));
writel(0x77999999, CREG_AXI_M_SLV1(M_USB_HOST));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_USB_HOST));
writel(0x76DCBA98, CREG_AXI_M_OFT1(M_USB_HOST));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_USB_HOST));

writel(0x77777777, CREG_AXI_M_SLV0(M_ETHERNET));
writel(0x77999999, CREG_AXI_M_SLV1(M_ETHERNET));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_ETHERNET));
writel(0x76DCBA98, CREG_AXI_M_OFT1(M_ETHERNET));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_ETHERNET));

writel(0x77777777, CREG_AXI_M_SLV0(M_SDIO));
writel(0x77999999, CREG_AXI_M_SLV1(M_SDIO));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_SDIO));
writel(0x76DCBA98, CREG_AXI_M_OFT1(M_SDIO));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_SDIO));

writel(0x77777777, CREG_AXI_M_SLV0(M_GPU));
writel(0x77777777, CREG_AXI_M_SLV1(M_GPU));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_GPU));
writel(0x76543210, CREG_AXI_M_OFT1(M_GPU));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_GPU));

writel(0x77777777, CREG_AXI_M_SLV0(M_DMAC_0));
writel(0x77777777, CREG_AXI_M_SLV1(M_DMAC_0));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_DMAC_0));
writel(0x76543210, CREG_AXI_M_OFT1(M_DMAC_0));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_DMAC_0));

writel(0x77777777, CREG_AXI_M_SLV0(M_DMAC_1));
writel(0x77777777, CREG_AXI_M_SLV1(M_DMAC_1));
writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_DMAC_1));
writel(0x76543210, CREG_AXI_M_OFT1(M_DMAC_1));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_DMAC_1));

writel(0x00000000, CREG_AXI_M_SLV0(M_DVFS));
writel(0x60000000, CREG_AXI_M_SLV1(M_DVFS));
writel(0x00000000, CREG_AXI_M_OFT0(M_DVFS));
writel(0x00000000, CREG_AXI_M_OFT1(M_DVFS));
writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_DVFS));

/*
* PAE remapping for DMA clients does not work due to an RTL bug, so
* CREG_PAE register must be programmed to all zeroes, otherwise it
* will cause problems with DMA to/from peripherals even if PAE40 is
* not used.
*/
writel(0x00000000, CREG_PAE);
writel(UPDATE_VAL, CREG_PAE_UPDT);
}

/* Default is 1, which means "PAE offset = 4GByte" */
writel_relaxed(0, (void __iomem *) CREG_PAE);

/* Really apply settings made above */
writel(1, (void __iomem *) CREG_PAE_UPDATE);
static void __init hsdk_init_early(void)
{
hsdk_init_memory_bridge();

/*
* Switch SDIO external ciu clock divider from default div-by-8 to
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